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MXD1816XR Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MXD1816XR Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 11 page General Description The MXD1810–MXD1813/MXD1815–MXD1818 family of microprocessor (µP) reset circuits monitor power sup- plies in µP and digital systems. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +2.5V/+3.0V/+3.3V (MXD1815–MXD1818), and +5V (MXD1810–MXD1813) systems. These circuits assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping reset asserted for at least 100ms after VCC rises above the reset threshold. The MXD1813/ MXD1818 also keep reset asserted for at least 100ms after the output is momentarily pulled to GND by an external push-button switch. The MXD1812/MXD1817 have an active-high push-pull RESET output. The MXD1810/MXD1815 (push-pull) and MXD1811/MXD1813/MXD1816/MD1818 (open-drain) have an active-low RESET output. The open-drain devices (MXD1811/MXD1813/MXD1816/MXD1818) have an internal pullup resistor to VCC. The MXD1813/MXD1818 feature a debounced manual reset feature that asserts a reset if the RESET pin is pulled low for more than 1.5µs. When used to initiate manual reset, RESET debounces signals from devices such as mechanical switches. For devices with this feature, the release of the external switch triggers the reset period. The MXD1810–MXD1813/MXD1815–MXD1818 are guaranteed to output the correct logic state for VCC down to +1V. These ICs provide a reset comparator designed to ignore fast transients on VCC. Reset thresholds are available between +2.18V and +4.62V. These small, low-power (4µA) devices are ideal for use in portable equipment. All are available in space-saving 3-pin SC70 and SOT23 packages, and are specified from -40°C to +105°C. Applications Computers and Controllers Intelligent Instruments Set-Top Boxes Printers Automotive Systems Critical µP and µC Monitoring Portable/Battery-Powered Equipment Features o Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages o Available in Four Reset Output Configurations o Factory-Set Reset Threshold Voltages: 2.18V, 2.31V, 2.55V, 2.88V, 3.06V, 4.12V, 4.37V, 4.62V o ±2.5% Reset Threshold Accuracy Over Temperature o Fixed Reset Timeout Period: 100ms (min) o Guaranteed RESET/RESET Valid to VCC = +1V o Debounced Manual Reset Detect (MXD1813/MXD1818) o Power-Supply Transient Immunity o No External Components o Low Power Consumption (4µA) o Pin Compatible with DS181_ Products (SOT23) o 3-Pin SC70 and SOT23 Packages Low-Power µP Reset Circuits in 3-Pin SC70/SOT23 ________________________________________________________________ Maxim Integrated Products 1 RESET (RESET) 1 3 GND VCC MXD181_X SC70-3 TOP VIEW 2 () ARE FOR THE MXD1812/MXD1817 RESET (RESET) 1 3 GND VCC MXD181_U SOT23-3 2 Pin Configurations Ordering Information 19-2243; Rev 0; 10/01 Ordering Information continued at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. PART † TEMP. RANGE PIN-PACKAGE MXD1810UR_ _-T -40 oC to +105oC 3 SOT23-3 MXD1810XR_ _-T -40 oC to +105oC 3 SC70-3 †The MXD1810–MXD1813/MXD1815–MXD1818 are available with factory-set VCC reset thresholds from +2.18V to +3.06V (MXD1815–MXD1818) and +4.12V to +4.62V (MXD1810– MXD1813). Choose the desired reset-threshold suffix from the Reset Threshold Table and insert it in place of the “_ _” follow- ing “R” in the part number. All devices are available in tape- and-reel only in 2500 unit increments. Other threshold voltages may be available. Contact factory for availability. *Patent pending |
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